Home / 21,020.98-29,009.15-11,589.90

Finding the Fourth Proportional to 21,020.98, 29,009.15 and 11,589.90

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Solution

The fourth proportional to 21,020.98, 29,009.15 and 11,589.90 is: 15,994.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,020.98 : 29,009.15 = 11,589.90 : x
  2. Step 2: Convert to fraction form
    21,020.98/29,009.15 = 11,589.90/x
  3. Step 3: Cross multiply
    21,020.98x = 29,009.15 × 11,589.90
  4. Step 4: Simplify right side
    21,020.98x = 336,213,147.59
  5. Step 5: Solve for x
    x = 336,213,147.59/21,020.98
  6. Step 6: Final answer
    x = 15,994.17

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.